That is Timber's favorite vegetable. I cut the stem off (enough to get the bottom leaves), cut about 3/4 inch off the top, strip the outer base leaves, wash it very well, then I pull it open so it looks like a flower. Hang it on a skewer or put it in the bottom of the cage. He actually prefers it in the bottom of the cage. He will attack it, chew on it, shred it, and when the day is done there is nothing left but a bit of the stem in a leaf or two. And I actually see him eating at least a bit of it!